12. Suppose you move the 500N crate by pulling upward on the rope at an angle of 30° above the horizontal. How hard must you pull to keep it moving with constant velocity? Assume that Hk=0.40.

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Q: 3. A magnet of mass of 4.00kg is suspended from the ceiling by a cord as shown. A large magnet is…

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Q: Activity 2. The block shown has a velocity va = 25 m/s at A and a velocity Và = 15 m/s as it passes…

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Q: 1. A mass moving at 1.70 m/s slides down a ramp angled at 30.0° to the horizontal. After the mass…

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Q: 6. A gymnast with a mass of 85 kg is training by doing pull ups using two ropes attached to opposite…

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Q: Question 10. A 16.2-kg sled is being pulled across a horizontal surface at a constant velocity. The…

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Q: 18.A 25 kg hanging object is connected by a light, inextensible cord over a light, frictionless…

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Q: A 1300 kg car speeds up from rest to 10 m/s in 5 seconds. If the car experiences a constant…

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Q: 1. For a short period of time, the frictional driving force acting on the wheels of the 2200-kg van…

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Q: 8. A 2.5 kg wagon is pulled with a force of 25 N at an angle of 18° above the horizontal. If the…

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Newton's Second Law

Newton’s laws of motion describe the relationship between the motion of an object and forces acting on it. Newton’s law of motion has two types as follows: